export default {
  // 为当前模块开启命名空间
  namespaced: true,
  // 模块的 state 数据
  state: () => ({
    // 购物车的数组，用来存储购物车中每个商品的信息对象
    // 每个商品的信息对象，都包含如下 6 个属性：
    // { goods_id, goods_name, goods_price, goods_count,
    //  goods_small_logo,
    //  goods_state
    // }
    cart: JSON.parse(uni.getStorageSync('cart') || '[]')
  }),
  // 模块的 mutations 方法
  mutations: {
    addCart(state, goods) {
      const findResult = state.cart.find((x) => x.goods_id === goods.goods_id)
      console.log(findResult)
      if (!findResult) {
        // 如果购物车中没有这件商品，则直接 push
        state.cart.push(goods)
      } else {
        findResult.goods_count++
      }
      this.commit('m_cart/saveCartStorage');
      console.log(state.cart)
    },
    saveCartStorage(state) {
      uni.setStorageSync('cart', JSON.stringify(state.cart))
    },
    updateGoodsState(state, goods) {
      const findResult = state.cart.find(x => x.goods_id === goods.goods_id)
      if (findResult) {
        findResult.goods_state = goods.goods_state
      }
    },
    updateGoodsCount(state, goods) {
      const findReault = state.cart.find(x => x.goods_id === goods.goods_id)
      if (findReault) {
        findReault.goods_count = goods.goods_count
      }
      this.commit('m_cart/saveCartStorage');
    },

    removeGoodsById(state, goods_id) {
      state.cart = state.cart.filter(x => x.goods_id !== goods_id)
      this.commit('m_cart/saveCartStorage')
    },
    updateAllGoodsState(state,newState){
    state.cart.forEach(x=> x.goods_state=newState)
      this.commit('m_cart/saveCartStorage')
    }
  },
  // 模块的 getters 属性
  getters: {
    total(state) {
      // let c = 0
      // state.cart.forEach(goods => c += goods.goods_count)
      // return c
    return  state.cart.reduce((total,item)=> total+=item.goods_count ,0)
    },
    //统计勾选的物品
    checkedCount(state) {
    return  state.cart.filter(x=> x.goods_state).reduce((total,item)=> total+=item.goods_count,0 )
    },
    checkGoodsAmount(state){
     return state.cart.filter(x => x.goods_state).reduce((total,item)=> total+=item.goods_price*item.goods_count,0)
    }
    
  },
  
}